
Mark M. answered 05/06/20
Mathematics Teacher - NCLB Highly Qualified
t represents the time John needs working alone
0.75 t represents the time Jason needs working alone
Times are in minutes
136 / t represents John working with Jason
136 / 0.75t represents Jason working with John
272 / 0.75t represent Jason working after John bailed.
(136 / t) + (136 / 0,75t) + (272 / 0.075t) = 1
Can you multiply by LCD, solve for t and answer?